YOU SAID:
Oh no, where did I put my pants?
INTO JAPANESE
ああ、どこに私のズボンを置いたの?
BACK INTO ENGLISH
Oh, where did you put my pants?
INTO JAPANESE
ああ、パンツはどこに入れたの?
BACK INTO ENGLISH
Oh, where did you put your pants?
INTO JAPANESE
ああ、あなたはズボンをどこに置いたのですか?
BACK INTO ENGLISH
Oh, where did you put the pants?
INTO JAPANESE
ああ、パンツはどこに入れましたか?
BACK INTO ENGLISH
Oh, where did you put your pants?
INTO JAPANESE
ああ、あなたはズボンをどこに置いたのですか?
BACK INTO ENGLISH
Oh, where did you put the pants?
INTO JAPANESE
ああ、パンツはどこに入れましたか?
it is unlikely that this phrase will ever reach equilibrium